Chapter 29: Crosstalk or Coupling? Chapter 29 explains that the terms crosstalk and coupling are used interchangeably to describe the unwanted interaction of an electromagnetic field traveling on one transmission line with a neighboring transmission line. Capacitive crosstalk and magnetic crosstalk are discussed in detail, along with routing rules that the PCB designer can implement to control these effects. This chapter covers the types of coupling that can occur between two transmission lines running in parallel – forward crosstalk and backward crosstalk. The reader will also learn about methods for controlling crosstalk, such as guard traces, as well as the relationship between high-impedance transmission lines and crosstalk risk.
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